Combination pressure tank and pump



July 12, 1949. A. P. RUTH COMBINATION PRESSURE TANK AND PUMP Filed Jan. 28, 1947 Patented July 12, T9413 UNITED STATES PATENT, QFFlCE 2,415,918 COMBINATION PRESSURE TANK AND PUMP Arflmr 2. man, Houston, Tex.

Application January 28, 1947, Serial No. 724,880

1 Claim. H)

This invention relates to a combination pressure tank and pump.

An object of the invention is to provide a combined pressure tank and pump adapted to be used in automatic water supply y tems and wherein the pump with the Venturi tube, incorporated into the pump suction line, will, at all times, be submerged in the water in the tank so that it will never be necessary to prime the pump.

It is another obiect of the invention to provide a combination of the character described wherein the pump and the Venturi tube incorporated into the suction line will remain completely submerged should the Supp y of water from the well, or other source, fail to that the pump will not become over heated in case of such failure.

It is a further object of the invention to provide a combination of the character described whereby the water submerging the Venturi tube and pump will be under pressure which will facilitate the flow of water through the inlet line thus relieving the pump of a portion of the load and increasingthe volume of water drawn in through the pump inlet line.

As herein above stated, the pump and the inlet line including the Venturi tube will be at all times submerged in the water in the tank thus minimizing the liability of freezing.

Other objects and advantages will be apparent from the following specification which is illustrated by the accompanying drawings, wherein:

Figure 1 is a vertical, sectional view of the tank showing the pump equipment installed therein.

Figure 2 is an enlarged, sectional view of the pump and Venturi inlet tube, and

Figure 3 is a transverse, sectional view of the pump taken on the line 3-4 of Figure 2.

Referring now more particularly to the drawings, wherein like numerals of reference designate the same parts in each of the figures, the numeral i designates a closed pressure tank.

Fitted through one side of the tank there is a pump housing 2, preferably, cylindrical in form. This housing may be welded to the tank or secured therein in any approved manner.

0n the inner end of this housing there is a centrifugal pump casing indicated generally by the numeral 3 and within this casing there is 2 the impeller 4. This impeller is fastened to the shaft 5 of an electric motor t which is secured to the outer side of the housing 2. The motor and pump are preferably constructed as a unit.

The pump casing 3 is provided with the side outlets 1, 'I through which the water may be discharged into the tank.

There is a suction line 0 leading from a well or other suitable source of supply. This suction line extends through the tank and incorporated in it there is a Venturi tube 9. One end 01' this Venturi tube is connected into the intake of the pump and there is a nozzle I one end of which is connected to the other end of the Venturi tube and whose other end is connected into the suction line 8 by means of a suitable coupling, as II. This nozzle II has the passageway I! through which water can flow from the intake pipe 8 into the Venturi passageway through the tube 9 and the nozzle III has the side inlet passageway l3 through which water under pressure may pass from within the tank and be discharged through the nozzle opening ll into said Venturi passageway.

It is to be understood that the water in the tank I will be, at all times, under pressure from the pump and this water under pressure flowing in through the passageway l3 and the nozzle opening H into the Venturi passageway through the tube 9 will create a suction therein thus drawing in the water from the well and correspondingly relieving the pump of a portion of the load.

The motor 6 is equipped with a conventional pressure switch l5. As the tank I is filled with water the air therein will be placed under pressure which will eventually operate to open the switch and stop the pump.

The tank I is provided with a surface line It which is located above the level of the pump and suction line 8. As the water is drawn oil from the tank I the pressure therein will decrease and the switch l5 will be closed, in the usual manner, and the pump will be started to draw in an additional supply of water to replenish what has been drawn on and until sufllcient pressure is then built up to again open the switch and stop the pump.

However, the pump and the suction line I within the tank I together with the Venturi tube! and nozzle II will always be submerged in water contained in the tank I and should the supply of water from the well become exhausted or for any reason air should be drawn in through the suction line I it will not be necessary to prime the pump since the pump, under those conditions. will remain submerged in the water in the tank I.

The drawings and description are illustrative merely while the broad principle of the invention will be defined by the appended claim.

What I claim is:

In combination, a single pressure storage tank, a pump and a motor unit in sealed relation with the wall of the tank at the lower end of the tank with the motor outside of, and the pump inside of, the tank, a suction line extended through the tank, adjacent the bottom of the tank, and sealed with the wall of the tank, said suction line ineluding a. Venturi tube one end 0! which is connected into the pump intake, said suction line also including a noule connected to the other 20 t endoftheventuritubeandconnectedintothe suction line, said nozzle having an inlet passazeway leadingdirectly from the tank and having a discharge nozzle opening aligned axially with the tube and directed toward the pump, said Venturi tube and nozzle being located wholly within said single tank and subject to the total pressure of the liquid in the tank.

ARTHUR P. RUTH.

REFERENCES CITED The following references are of record in the me of this patent:

UNITED STATE PATENTS 

